Safety device job intebnal-combustion engines



Dec. 6; 1927.; v 1,652,113

4 X V J. P. GERAGHTY- SAFETY DEVICE FOR INTERNAL COMBUSTION ENGINES Filed Feb. 12, 1925 2 Sheets-Sheet 1 MTNEssEs INVENTOR ATTORNEYS Dec. 6, 1927. 1 1,652,113

J. P. GERAGHTY SAFETY DEVICE FOR INTERNAL COMBUSTION ENGINES Filed Feb. 12, 1925 2 Sheets-Sh 2 INVENTOR (70711 'emy lij ATTORNEYS Patented Dec. 6, 1927.

JOHN 1 eEnAenamor messy our, unevenness.

. sum? DEVICE Ion m'r-nmvanooivmnsrion ENGINES! rApplieation filed February 'lhis invention relates to improvementsgin safety devices for internal combust on engines andhas for an object to provide a construction wherein the engine may be started or stopped either manually or electrically,

Another ob-jectIofthe invention is to provide a device for: internal combustion' engine's wherein means are provided which may be either electrically or manually operated and, when operated cause the starter to bve disconnected from. its source of currentas} soon as the engine begins'to' funetion. r

A. still further object of the invent on, 1s to provide a safety device for internal 00111;

5' bustion; engines wherein a starting button,

- of the invention,

lever orother structure may be held in funcQ ticning position for a long time, and yet the starter will be thrown out of operation immediately upon the functioning of the en- 20 g t-1e In the accompanying drawings I Figure l is an elevation of; the principal part o f-the mechanism embodyingthe in vention; I l. V

Fig. 2 is a sectional View through Fig. l on theline 22; V

Fig 3 is a framnentary view, partly in seehem-showing a broken; v n Fig. et is a. view similar to Fig. 3 but showmg the. circuit closed v 7 igh is a View similar to Fig. 1, but on areduced scale and looking at the structure from the opposite side Fig. 6. is a view similar toFig. 5, but showing an electrically-operated structure instead of a mechanically-actuated structure Fig. 7 is a schematic view showing the various contacts. and associated parts of the apparatus,- which control the current. tolthe various parts of the engine; l g

Fig. 8 is a vertical sectional view through Fig 1 approximately on: the line 8-58;

Fig. .9 is a face view of the switch plate. owndn Figs. V a l f Fig lO is an enlarged. perspective View of the resetting arm embodying certain features In constructing the device embodying the invention, means have been provided for either manually or electrically closing the switches of the starter, ignition and the generator internal combustion engineand later automatically opening the circu t of I the starter while'leaving the c rcuits ofthe ow the ignition circuit: is

12, 19%. Serial N0. 3389.

generator and ignition closed. ll'leanshave also been provided for closing the circuit of .the starter except at onepoint when the engine is stopped and opening the circuit from the starter. to the battery;

In constructing a device as outlined a. s it.

able frame or housing is provided, which i maybe of any desirable material, but which 1s preferably made in two part-s;v as shown in Fig. 8, so that the mechanism enclosed ther'es maybe readily" applied or removed. As; indicated particularly in F ig. 8; the casing l l is provided with a hollow boss 2 for. ac-

commodating the shaft 3, and other suitable hollow bosses for accommodating certain other shafts or supporting members. A resett ng arm t is rigidly secured to shaft 8 in any desired manner, such arm having an oiiset 5 adapted to engage the projection 6 extending from thefiange; 7. formed on asleeve 8. The sleeve 8- snuglyfits into the switch disk 9 and is clamped into position by a suitablenut 1O, whereby the parts ro-' tate to'gether. A spring llis provided and so positioned that one end is extended into the casing; 1, while the opposite end extends into the disk 9. This spring normally tends to move the "disk 9 clockwise from the position in Figures 3 and 7 to the position shown in 43 and Will-do so when catch-28 is releas inafter described, which will move the: disk to Qt -he. position shown in Figs. 3 and 7,. whereby the spring 11 will be brought under tension. and whenever released will cause the disk 9. to againassume the position shown in Fig. l." The disk 9 is provided withlapain or contact plates 12 and '13. The contact plate 12 coacts with contact posts 14. and 15;

'while thecontact plate- 13- coacts withthe' contact, posts 16 and 17. Each of the contact posts 14, and l5 is provided with a contact member 18 and caused to frictionallyengage the plate 12 by suitable springs 19carrie'd in a'socket formed" in the various hold- Means have been provided a;s here ing members 20, which are clampedin pos'ition by suitable nuts 21 The posts 16 and 17 are each provided with a reciprocating contact; member- 22 andacaju'sed to function properly by reason of the spring 23 posi tioned in a socket in the supporting member 24, which supporting member 2d is clamped firmly in place'by a suitable nut 25. The contact member 22 of the post 17 is provided with a pair of notches 26whichg are adapted will fit into the notch 29. magnets are provided. and when enerto receive a wire orother member, which will be positioned therein and wound around the contact 22 when the contact is pulled away from the plate 13. This will lock or iirmly maintain the contact 22 out of engagement with the plate 13, and thereby permanently hold the circuit of the starter 27 open. This is desirable when the starter is out of order or when it is desired to repair eer tain parts.

In order to hold the disk 9 in the position shown in Fig. 7, after arm 4 has been moved away from projections (-3, a resilient catch 28 is provided, which has a tendency to move in such a direction that the turned-over end One or more gized act to pull the *atch 2.3 a my from the disk 9, whereby spring 11 will begin to function and return the parts to the posi tion shown in Fig. l, whereby the circuit oi the starter 27 is opened.

In ope 'ating the shaft 3, rFertrically-operated means may be used, or, if preferred, manually-actuatedm ans may be employed. Asshown in Fig. 5, the shaft 3 is rigidly secured to an arm 31, which in turn is pivotally connected. as at 32, to the link 33 at the point 3 1, and pivotally connected to one arm of a bell crank lever the opposite end being pivotally connected, as at 36, to the thrust rod. The thrust rod 37 may be moved back and forth by hand, or may be connected to locking means which when operated will cause the desired back-and forth movement to give the shaft 3 the desired rocking action.

In Fig. 6, an electrically-operated structure is presented wherein a core 38is substituted for the thrust rod 37 and associated with a solenoid 39. A second core is also pivotally connected to the bell crank lever 35, in the opposite direction to the core 38. The windingof the solenoid 39 is connected through a suitable conductor to a source of current 42, and to a! circuit-closing structure 43, which may be a push-button, key, or other suitableclosing structure. \Vhen the circuit closer -13 is caused to function for closing the circuit of the solenoid 39, the core 38 will be pulled and the shaft 3 will be rocked in one direction. hen the circuit-closing structure -14 is closed, the sole noid t1 will be energized and the core 40 pulled, moving the parts in the opposite direction or back to the position shown in F ig. 6. The circuit closer 4d may be a pushbutton, key, or other device, as desired. From this it will be seen that the shaft 3 is rocked in both directions by electrieallyoperated means, and the various parts shown in Figs. 7 and 8 caused to function as heretofore described.

VVhenthe engine is to be started and the parts are in the position shown in Figure 3,

the thrust rod 37 is moved inwardly and the shaft 3 rocked a certain distance. In case the structure shown in Fig. 6 is to be used, the circuit closer 13 is closed temporarily and the shaft 3 will be rocked in a similar manner. The rocking oi the shaft 3 will cause the arm 4: to move away from rod 47 whereupon spring 48 will :tunction to cause contact -16 to move into engagement with contact 45. Innnediately that the parts are moved to the position shown in Fig/T, the various circuits are closed through the plates 12 and 13, and also through the ignition begun to function, the generator 51 will beginto impress current on the line, and as soon as this takes place, the magnets 30 will begin to function. to allow current to pass from the generator to line 50 but acts toprevent current flowing in the opposite direction, thus permitting the generator to charge the battery but preventing waste of current from the battery to the generator when the generator is Stationary. i

In tracing the circuit for theignition at the starting of the engine, current will pass from the storage battery 49 to wire 50,

through switch 45 and contact member 46,

The device 51 functions till wire 53, through the primary coil 54, and

thence to the ground. Thiswill inducecurrent in the secondary of the coil whereupon the distribute will be provided with high tension current. At the same time that ourrent flows through the ignition circuit, as]

above described, current willpass from wire 52 to the contact post 16, plate 13, contact post 17, wire 56, starter 27 and fromthence to the ground, whereupon the starter will begin to function for turning overthe engine. As soon as the engine turns over, the generator 51 will be m to function and current will pass from thence to the contactpost 15, plate 12, contact post 14, wire 56, electromagnots 30and from thence to the ground.

As soon as this takesplace, the catch 28 will be pulled away from the disk 9 and the tension ofthe spring 11 will then rotate the disk clockwise as arrow 9' indicates for a distance or until the parts assume the position 1 shown in Fig. 4. This will cause the plates 12 and 13, respectively, to move away from posts 14 and 17, which action deprives the magnets 30 and also the starter 27 of current but leaves the ignition circuit closed and also the circuit of the generator to the ignition and to the battery 49 closed.

When it is desired to stop, the engine, the shaft 3 is rocked in the opposite direction by either the solenoid41 or the rod 37. This reverse rocking of the shaft will cause the arm 1 to move to the position shown in Fig. 3, and which action will cause the arm .4 to strike the projection 6 and rotate the disk 9 until the switch 15 is opened and until-catch 28 again moves into the notch 29, spring 11 being also brought under tension. WVhen this occurs, the contact posts 14 and 15 will again rest onthe plate 12, while the contact posts 16 and 17 will rest on the plate 13, but

neither the generator nor the starter can function because the'circuit of the starter is opened bythe opening of the switch 45 and the action of the generator is stopped by reason of the stopping of the engine as the spark plugs thereof will not function.

To again start the engine, it is only necessary to close the switch 15 by rocking the shaft 3 as'heretofore described, and the various actions above described will take place. It will thus be seen thata key, push button, or similar circuit closer, may be used for causing an electrical starting or stopping of the engine when the construction in Fig. 6

' is utilized. When the construction shown in Fig. 5 is utilized, the back-and-forth movement of therod 37 will cause the proper action of the various parts.

What I claim is: i

A switchincluding a rock shaft, an arm extending fromthe rock shaft, a pair of cone tacts forming partof a circuit, a rod formed 7 as part of a second circuit, said plates being positioned to close said second circuit when moved by said arm, a spring for moving said disk and plates in a direction opposite to the movement of said arm. whereby said second circuit is opened, and a catch co-acting with said disk for normally locking the same against movement.

JOHN P. GERAGHTY. 

